Infineon Technologies CY8C24423A4-24SXI

Overview

CY8C24423A4-24SXI from Cypress Semiconductor is a programmable 8-bit PSoC® System-on-Chip featuring an M8C CPU core running at up to 24 MHz, 4 KB flash, 256 bytes SRAM, six analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), and four digital PSoC blocks (including UART, SPI, I²C, PWM, and timers). It operates from 2.4 V to 5.25 V across –40 °C to +85 °C and targets embedded sensor interface and mixed-signal control applications.

For engineers reviewing the CY8C24423A4-24SXI datasheet, CY8C24423A4-24SXI pinout, CY8C24423A4-24SXI application, or CY8C24423A4-24SXI equivalent, key selection factors include its 28-pin SOIC package, integrated 24 MHz IMO with ±5% accuracy, on-chip switch-mode pump enabling 1.0 V operation, configurable GPIO drive modes (25 mA sink), and analog input routing flexibility across eight standard and four restricted analog inputs.

Technical Context

The device implements a Harvard-architecture M8C core with 8×8 multiply and 32-bit accumulate capability, supported by multiple clock sources: internal 24/48 MHz IMO, 32 kHz ILO, optional 32.768 kHz ECO with PLL for crystal-accurate 24 MHz, and external oscillator up to 24 MHz. Clock dividers and global digital/analog interconnects enable flexible resource routing.

Analog system integration includes six rail-to-rail PSoC blocks supporting programmable gain amplifiers, comparators, filters, and decimators; digital system comprises four 8-bit blocks combinable into 8–32-bit peripherals such as UART, SPI, I²C (up to 400 kHz), CRC, PRS, and PWM with dead-band - all connectable to any GPIO via global buses.

Key Specifications

Pinout & Package

CY8C24423A4-24SXI is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package with 300 mil body width, RoHS-compliant, and moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal controller applications.

Compared with CY8C24223A-24SXI and CY8C24423A-24PVXIT, the CY8C24423A4-24SXI delivers full 4 KB flash, six analog blocks, and SOIC packaging - making it optimal for production designs requiring field-upgradable firmware, multi-sensor signal conditioning, and automated SMT assembly.

Availability

CY8C24423A4-24SXI is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home thermostats, portable medical monitors, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for CY8C24423A4-24SXI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable embedded solutions, memory, and connectivity products for industrial, automotive, and consumer markets.

The CY8C24x23A PSoC 1 family was designed for cost-sensitive, low-power mixed-signal embedded control - integrating configurable analog and digital peripherals with an 8-bit M8C core to replace discrete ICs in sensor, actuator, and human-interface applications.

FAQ

What development tools are required to program CY8C24423A4-24SXI?

PSoC Designer™ v5.4 or later is the official IDE, providing drag-and-drop hardware configuration, C compiler, and debug support. Programming requires MiniProg3 (CY8CKIT-002) or MiniProg1 (CY3217), both supporting ISSP. No external programmer is needed - full in-system serial programming is built-in via dedicated pins.

Does CY8C24423A4-24SXI support true 14-bit ADC resolution?

Yes - the device achieves effective 14-bit resolution using oversampling and decimation with its analog PSoC blocks. This requires configuring the decimator module and appropriate PGA gain; typical SNR exceeds 80 dB at 100 SPS. Resolution degrades to 12-bit at >1 kSPS due to noise floor trade-offs.

Can all GPIO pins be used for analog input simultaneously?

No - eight GPIO pins (P0[0]–P0[7]) support full analog input routing to all six analog blocks. An additional four analog inputs are available on P1[0]–P1[3], but only with restricted routing paths (e.g., to specific PGA inputs), limiting concurrent use in complex analog topologies.

Is the 24 MHz internal oscillator stable enough for UART communication?

Yes - the 24 MHz IMO has ±5% accuracy over temperature and voltage, sufficient for UART at 9600–38.4 kbps with standard 16× oversampling. For higher baud rates (e.g., 115.2 kbps), use the PLL-locked 24 MHz clock derived from a 32.768 kHz crystal to achieve <1% error.